Year Number
1950 91.596
1951 91.429
1952 91.057
1953 90.822
1954 90.64
1955 90.363
1956 90.935
1957 91.458
1958 91.885
1959 92.272
1960 92.696
1961 93.693
1962 94.681
1963 95.578
1964 96.23
1965 96.544
1966 97.276
1967 97.37
1968 97.016
1969 96.42
1970 95.642
1971 94.501
1972 93.283
1973 91.909
1974 90.296
1975 88.47
1976 86.548
1977 84.663
1978 82.805
1979 80.981
1980 79.221
1981 78.009
1982 76.652
1983 75.323
1984 74.223
1985 73.418
1986 72.76
1987 72.386
1988 72.143
1989 71.796
1990 71.228
1991 70.782
1992 70.045
1993 69.123
1994 68.17
1995 67.252
1996 66.288
1997 65.403
1998 64.533
1999 63.59
2000 62.551
2001 61.579
2002 60.55
2003 59.505
2004 58.508
2005 57.591
2006 56.823
2007 56.095
2008 55.423
2009 54.813
2010 54.264
2011 53.799
2012 53.394
2013 53.035
2014 52.699
2015 52.375
2016 52.097
2017 51.823
2018 51.563
2019 51.329
2020 51.129
2021 50.964
2022 50.822
2023 50.713
2024 50.651
2025 50.646
2026 50.7
2027 50.799
2028 50.925
2029 51.057
2030 51.183
2031 51.305
2032 51.421
2033 51.525
2034 51.612
2035 51.678
2036 51.713
2037 51.725
2038 51.736
2039 51.777
2040 51.865
2041 51.979
2042 52.133
2043 52.325
2044 52.547
2045 52.797
2046 53.047
2047 53.319
2048 53.623
2049 53.973
2050 54.377
2051 54.794
2052 55.255
2053 55.749
2054 56.256
2055 56.76
2056 57.213
2057 57.667
2058 58.121
2059 58.575
2060 59.034
2061 59.439
2062 59.848
2063 60.268
2064 60.71
2065 61.183
2066 61.599
2067 62.039
2068 62.512
2069 63.023
2070 63.567
2071 64.03
2072 64.531
2073 65.065
2074 65.629
2075 66.223
2076 66.724
2077 67.253
2078 67.816
2079 68.41
2080 69.027
2081 69.523
2082 70.052
2083 70.605
2084 71.176
2085 71.764
2086 72.211
2087 72.681
2088 73.177
2089 73.698
2090 74.244
2091 74.629
2092 75.042
2093 75.484
2094 75.958
2095 76.461
2096 76.782
2097 77.145
2098 77.553
2099 77.997
2100 78.467